Microstructural effects on fracture resistance in TiAl-base alloys
Book
·
OSTI ID:225158
- Southwest Research Inst., San Antonio, TX (United States)
The role of microstructure in imparting fracture resistance in TiAl-base alloys is reviewed to assess the state of the art. Contributions to initiation and crack growth toughnesses by deformation processes near the crack tip and in the crack wake ligaments are delineated, and the controlling microstructural parameters established. Effects of microstructural variables such as volume fraction of lamellar grains, grain size, and lamellae spacing, on fracture toughness and tensile ductility are considered in terms of micromechanical models. Toughness improvement for TiAl-alloys by microstructural control is investigated with the aid of the models. The theoretical result of optimum microstructures for achieving balanced properties of toughness and ductility is evaluated against experimental data.
- OSTI ID:
- 225158
- Report Number(s):
- CONF-950201--; ISBN 0-87339-304-X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of lamellae spacing and colony size on the fracture resistance of a fully-lamellar TiAl alloy
In situ observation of fracture process of a TiAl alloy with fully lamellar microstructure
Fatigue and fracture behavior of a fine-grained lamellar TiAl alloy
Journal Article
·
Tue Jan 31 23:00:00 EST 1995
· Acta Metallurgica et Materialia
·
OSTI ID:27879
In situ observation of fracture process of a TiAl alloy with fully lamellar microstructure
Journal Article
·
Mon May 15 00:00:00 EDT 1995
· Scripta Metallurgica et Materialia
·
OSTI ID:69648
Fatigue and fracture behavior of a fine-grained lamellar TiAl alloy
Journal Article
·
Tue Dec 31 23:00:00 EST 1996
· Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
·
OSTI ID:438585
Related Subjects
36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
BORON ADDITIONS
CHROMIUM ALLOYS
CRACK PROPAGATION
CRACKS
DUCTILITY
ELONGATION
EXPERIMENTAL DATA
FRACTURE MECHANICS
FRACTURE PROPERTIES
GRAIN SIZE
INTERMETALLIC COMPOUNDS
LAMELLAE
MANGANESE ADDITIONS
MICROSTRUCTURE
NIOBIUM ALLOYS
TENSILE PROPERTIES
TITANIUM ALLOYS
TUNGSTEN ADDITIONS
VANADIUM ALLOYS
ALUMINIUM ALLOYS
BORON ADDITIONS
CHROMIUM ALLOYS
CRACK PROPAGATION
CRACKS
DUCTILITY
ELONGATION
EXPERIMENTAL DATA
FRACTURE MECHANICS
FRACTURE PROPERTIES
GRAIN SIZE
INTERMETALLIC COMPOUNDS
LAMELLAE
MANGANESE ADDITIONS
MICROSTRUCTURE
NIOBIUM ALLOYS
TENSILE PROPERTIES
TITANIUM ALLOYS
TUNGSTEN ADDITIONS
VANADIUM ALLOYS